Valve mechanism for internal-combustion engines



E. R. BUFZTNETT VALVE MECHANISM FOR INTERNAL COMBUSTION ENGINES FiledDec. 22, 1920 2 Sheets-Sheet 1 may; [5.3a

Oct. 30 1923. H WZ 4LO E. R BURTNETT VALVE MECHANISM FOR INTERNALCOMBUSTION ENGINES Filed e 22. 1920 2 Shams-Shaw 8 Patented Oct. 30,1923.

EVERETT R. BURTNETT, OF LOS ANGELES, CALIFORNIA, ASSIGNOR 0F ONE-HALF TOHOMER A. BRUNELL, OF LOS *ANG-ELES, CALIFORNIA.

VALVE MECHANISM FOR'IN'IERNAIl-COMBUSTION ENGINES.

Application 'filed December 22, 1920. Serial No. 432,529.

and useful Improvements in Valve Mechanism for Internal-CombustionEngines, of which the following is a specification.

It is the object of this invention to provide,

a novel valve mechanism for an internal combustion engine including aplston valve received-within a valve chamber and a sleeve valve receivedupon the outside of the valve chamber in an annular space providedbetween the latter and an externalsleeve.

More specifically it is the object of the invention to provide a valvemechanism wherein excessive heating of the parts willv be prevented, andin which simple but eflicient actuating means are provided for the valvemechanism.

Further objects of the invention will be understood from the followingdescription of the accompanying drawings, in which;

Figure 1 is a longitudinal section through a cylinder and valvemechanism of an internal combustion engine constructed in accordancewith the invention.

Fig. 2 is a longitudinal-section on the line 2-2'of Fig. 1'. r

Fig. 3 is a side elevation, partly broken away, of an internalcombustion engine showing the actuating mechanism for the improved valvestructure.

Fig. 4 is a transverse section on the line 44 of Fig. 1.

In the drawings a working cylinder is shown at 1 surrounded by the waterjacket 2. The working cylinder projects from a crank casing 3 throughwhich extends the crank shaft 4. The Working piston3 is connected toconnecting rod 6 which is mounted upon a crank throw 7 of shaft 4.

The valve mechanismincludes a cylinder 8 having the water jacket 9surrounding the same throughout a portion of its len h and the radiallyspaced sleeve 10 surroun ing the opposite end of the cylinder 8. Thecasing for the-valvemechamsm, as thus constructed, is mounted upon thetop of the casing forming cylinder 1 and water jacket 2 with the valvecasing extending transversely of cylinder 1. The valve casing is,preferably. supported at 'an inclination to the axis of cy inder 1 andis so arranged that the end way of the port 30. A usual is arranged inthe space 28.

thereof having the water jacket 9 is in' 1ongitudinal alinement with thecylinder 1, while the portion of-the valve cylinder having sleeve 10projects laterally beyond the working cylinder. WVater jacket 9 mayconmeet with water jacket 2 with an inlet 11 provided in jacket 2,andanoutlet 12 pro- Vided in jacket 9. i

At the side of the cylinder land valve cylinder 8 adjacent water jacket9, a casing 13 is provided extending from crank casing 3 andloverlyingthe end of cylinder 8. This casing contains the actuatingmechanism forthe valves, the end of cylinder 8 adjacent said actuating mechanismbeing open so as to readily receive operating connections from theactuating mechanism.

The actuating mechanism for the valves includes a shaft 14 journaled inthe crank casing and rotated at one-half engine speed and in thedirection of rotation of the crank shaft 4 by means of thetrain ofgearing 15. Eccentrics '16 and 17 are fixed upon shaft 14 with theeccentric l7 one-fourth of-a revolutien in advance of eccentric 16. Rockarms 1 8-19 are connected to eccentric 1617 throu h the lugs 20, andthese rock larms upwardly through casing 13. Intermediate of'their endsthe rock arms are fulcrumed in rock bearings 21. The upper ends of therock arms are in longitudinal alinement beyond the end of cylinder 8 andare provided with connecting links 22-23. These connecting linksaresecured to the piston valve and the sleevevalve of the valve mechanismrespectively, as will be hereinafter described.

A piston valve is mounted in cylinder 8 and is, preferably, formed asasleeve 25 having piston heads 26-27 at its respective ends forming anannular space 28 between said piston heads. The piston valve is cylinder8 opposite the sleeve 10. The space 28 is thus in alinement with workingcylinder 1 and communicates with the same by spark plug 31 A. sleeve 32extends through sleeve 25 with a shoulder 33 upon said sleeve abuttingagainst. the end of sleeve 25 at the head 26, and nuts 34 threaded uponthe opposite 'is-connected by an arm 52 to the end of sleeve 32 heyondthe opposite end of sleeve and abutting against the same. The sleeve 82is connected by the arm 85 to the link 22 so that-the movement of rockshaft 18 will reciprocate the piston valve within cylinder 8.

The sleeve valve of the valve mechanism is shown at 37 mounted in theannular space 38 between cylinder 8 and sleeve 10. The annular space 38is open at its outer end as shown at 40, and the sleeve valve 37 isprovided with an annular port 41 opening to space 38 at its outer end asshown at 42 and opening at its inner end through the inner periphery ofthe sleeve valve as shown at 43. The inner end of the sleeve valve iscut away at the side thereof, as shown at 44, so as to form a passageleading 'to an inlet 45 extending through the wall of sleeve 10 to theannular space 88.

The outer end of the sleeve valve is provided with a cap 46 extendingover the outer open end 47 of the cylinder 8. A rod 48 extends throughthe sleeve 32, and the outer endof the same is provided with a shoulder51 abutting against cap 46 with a continuation of said rod extendingthrough cap 46. Nuts are threaded upon the outer end of said rod todetachably connect the sleeve valve to rod 48. The inner end of rod 48link 23 so that movement of rock arm 19 will actuate sleeve valve 37'.

Ports 54 extend through cylinder 8 at the annular space 38. The sleevevalve 37 is arranged to move outwardlybeyond ports 54 so as to permitthe latter to communicate "same by way of openings 43.

with inlet 45 through the passage 44, and is arranged to be movedinwardly so as to close ports 54 and subsequently open the It will beunderstood that the outer end of ports 41 is open to the space 38 which,at its open end 40, forms a discharge. The piston valve reciprocatingwithin cylinder 8 is adapted to open and close ports 54 to the space 28whic is in communication with the working cylinder by way of port 30. I

As shown in Fig. 1, when the working piston is upon its dead center atthe beginning of the expansion stroke, the piston valve is atits innerlimit of movement closing ports 54, and the sleeve valve'is midway ofits movement and moving inwardly with ports 54 closed by said sleevevalve.

At the beginning of the succeeding exhaust stroke, the sleeve valve willhave moved to cause openings 43 to register with ports 54, and duringsaid exhaust stroke ports 54 will be gradually cut of? by the outwardmovement of the sleeve valve, The piston valve will still cover ports'54 as the exhaust stroke starts, but its continued outward movementwill uncover said ports during said stroke. As a result an exhaust pas-Qo, ports ward movement'ot said head sa is provided by way of port port41, and space discharge 4%. The sleeve valve eturned to the positionshown in -Fig. l the suction stroke commences, and during said strokethe outward movement of said valve will open inlet to ports 54 by way oipassage At the same time ports 54, which have been uncovered by pistonvalve head 27, inward movement of said head. lVhiie the ports 54 remainopen an inlet passage is provided through the same to space 28 and theport 80.

iihenthe ports compression stroke starts, 54 are closed by head 27 andthe inwill retain said ports closed during the stroke. At the same timethe inward movement of the' sleeve valve will also gradually shut offsaid ports iVhen the cycle of operation is thus completed, the portswill, again be in the position shown in Fig. 1 ready for a repetition ofthe engine action.

Various changes will be made withoutdeparting from the spirit of theinvention as claimed.

What is claimed is:

1. An internal combustion engine including a working cylinder, a valvechamber extending across the top of said cylinder and communicating withthe same at one end, a sleeve surrounding said valve chamber at theother end thereof to form an annular space between thevalve chamber andsleeve, a water jacket surrounding the first mentioned end of said valvechamber, a portleading from said valve chamber to said annular space, apiston valve within saidvalve chamber, and a sleeve valve within saidannular space, said valves functioning to control the inlet and exhaustthrough said port. 4

2. An internal combustion engine including a working cylinder, a valvechamber extending across the top of said cylinder and communicating withthe same, a sleeve surrounding said valve chamber to form an an nularspace, a port leading from said valve chamber to said annular space, apiston valve within said valve chamber having heads at opposite sides ofthe communication with said working cylinder and forming a passagebetween said heads, and a sleeve valve within said annular space, saidvalves functioning to control the inlet and exhaust through said port.

3. An internal combustion engine including a working cylinder having awater jacket, a valve chamber extending across the top of said cylinderand communicating with the same, a sleeve surrounding said valve chamberto form an annular space, a partition in the latter forming a waterjacket communicating with the water jacket of will be gradually cut offby the port leading from said valve chamber to said last mentionedspace, a piston valve within said valve chamber, and a sleeve valveWithin said last mentioned space, i

said valves functioning to control the inlet and exhaust through saidport.

- tending across the top of said cylinder and communicating with thesame, a sleeve surrounding said valve chamber to form an annular s ace,a valve cham er to said annular space,'a piston valve within said valvechamber controlling a passageway from the working cylinder to said port,and a sleeve valve within said annular space controlling fuel inlet andexhaust through said port and havingan annular port communicating withsaid annular space at its outer end and opening at its inner nd throughthe inner periphery ofthe sleeve valve. 1

5. An internal combustion engine including a working cylinder, a valvechamber extending across the top of said cylinder and communicating withthe same, a sleeve surrounding said valve chamber to form an annularspace, a ort leading from said valve chamber to sai annular space, apiston valve within said valve chamber controlling a passageway fromvtheworking cylinder to said port, an inlet in said sleeve, a discharge fromsaid annular space, and a sleeve -valve within said annular space andcausing communication between said port and the inlet and exhaust.

6. An internal combustion engine including a working cylinder, a valvechamber extending across the top of said cylinder and.

communicating with the same, a sleeve surrounding said valve chamber toform an annular space, a port leading from said valve chamber to saidannular space, a piston valve within said valve chamber controlling apassageway from the working cylinder to said ort, an inlet in saidsleeve, the end of said s eeve being open to form an exhaust, and asleeve valve within said annular space having an opening therethroughfrom its outer end to its inner periphery, said sleeve valve causingcommunication-between said port and said inlet beyond its inner end, andcommunication between said port andsaid exhaust through S id opening.

7. An internal combustion engine including a working cylinder, a valvechamber extending across the top of said cylinder and communicating withthe same, a sleeve surexhaust through said 4. An internal combustionengine includ-' ing a working cylinder, a valve chamber ex= ort leadingfrom said.

rounding said valve chamber to form an annular space, a port leadingfrom said valve chamber to said annular space, a

piston valve within said valve chamber con trolling a passageway fromthe working cylinder to said port, a sleeve valve within said annularspace controlling fuel inlet and ort, and rock arms having drivingconnections with the engine shaft for actuating said valves.

8. An internal combustion engine including a working cylinder, a valvechamber extending across the top of said cylinder and communicating withthe same, a sleeve surrounding said valve chamber to form an annularspace," a port leading from said valve chamber to said annular space, apiston valve within said valve chamber, a sleeve valve within saidannular space, a driving connection fon'said piston valve, and a drivingconnection for said sleeve valve extending through said piston valve andconnected to said sleeve valve at the outer end of said annular space.

9. An internal combustion engine including a working cylinder, avalvechamber extending across the top of said cylinder and communicating withthe same, a sleeve surrounding said valve chamber to form an annularspace, a port leading from said valve chamber to said annular space, apiston valve within said valve chamber, a sleeve valve within saidannular space, a driving connection for said piston valve, and a drivingconnection for said sleeve valve extending through said piston valve andcon nected to said sleeve valve at the outer end of said annular space,said valves being detachably secured to their driving connections.

10. An internal combustion engine 'including a working cylinder, a valvechamber extending across the to of said cylinder and communicating witht e same, a sleeve surrounding said valve chamber to form an annularspace, a port leading from said valve chamber to said annular s ace, apiston valve Within said valve cham er, a sleeve valve .withinsaidannular space, a driving connection for said piston valve, a drivingconnection for said sleeve valve extending through said piston valve andconnected to said sleeve valve at the outer end of said annular space,said valves being detachably secured to their driving connections, andmeans for removing said valves-through the outer ends of said valvechamber and annular space.

In testimony whereof I have signed my name to this specification.

' EVERETT R. BURTNETT.

